I picked up a 661 Evo Preassure suit for my first enduro (this weekend).
I was also looking at Scott Recruit Pro II and O’Neal Magnetic Morveo, but went with the 661 in the end, due to coverage and availability.
I’ve done a few 3 hour rides wearing it, a jacket and a back pack (plenty of climbing too). The back protector feels similar to wearing a backpack, and not much sweatier. At first I wore the chest plate too tight and noticed it affected my breathing, but I wear it a little looser now and it’s fine. My jacket blocks the wind out, so it hasn’t been much warmer with the chest plate (but it is a bit warmer). The arms and shoulders are good too, off the bike I notice restriction in movement at the extremes, but on the bike I don’t notice it. They form around your arms and can be a bit hard to get off. I’m not a very sweaty person, and the weather has been cool but I’ve not thought it was too hot. I’d been wearing a baselayer, t-shirt and jacket before I got it. Just this and a jacket or jersey now. They are about equal in warmth.
The chest plate and back protector are removable too, so you could just run with the elbow and shoulder padding.